Abstract

PURPOSE:Atrial fibrillation is the most common complication after coronary artery bypass grafting (CABG) surgery. Patients with large body size undergoing CABG surgery have been growing due to the ongoing epidemic of obesity. Primary studies have showed conflicting results regarding whether obesity increases the risk of postoperative atrial fibrillation (POAF). It is also remains undefined how obstructive sleep apnea (OSA) may affect the relationship between obesity and POAF.

METHODS:We collected data on 9,993 consecutive patients without preoperative atrial fibrillation who underwent isolated CABG surgery during July 1, 2000 to June 30, 2007. The incidence of new-onset POAF and factors having potential influence on POAF were stratified by body mass index (BMI=kg/m2.).

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